Clamp for concrete-forms.



E. c. MUELLER. GLAMP FOB CONCRETE FORMS.

APPLICATION FILED NOV. 21, 1913.

1,1 15,719. Patented Nov. 3, 1914.

WITNESSES: INVENTOR I ATTORNEY THE NORRIS PETERS 60.. PHdTo-LITH x, WASHINGTON, D. C.

* wnnnnsnnnow c mmunes WEST anus, Wiscons n, A CORPORATION or" To all whom, itmay concern:

1 Be it 'known'that I, EDWARD CARL LE a itizen of the United States, residing at'Milwaukee, countyof Milwaukee,- and State of WVisconsin, have invented new; and useful Improvements in. Clamps for,Con-' 'erete-Forms, of which tl g f fl i a specification. J l a a The object of "my invention is to provide a clamping, device for. holding the parts of concrete forms together while the material is hardening orsettin'g,but the devicemay,

be used in other relationsin whichflexible Y adapted to be placed about theform and it may be found serviceable;

My device comprises a readily bent into shape loosely conforming to the exterior shape of the form, a leyver attached to one end of theband and pro vided with means for posit vely engaglng' the band near" its other end,-and further.

I 1 means on the band for securing the lever in its tighteningposition on the form. I, v wProminent objects of my nvention are to provide eflicient means for --clamp1ng the free end of the flexible band in the lever so there willo be no slipping of the hand through the lever as it is being swung into its tighteninglposition, andto obv ate sharp bends n the 1 flexible band thus ncreas ng the ease with which it may be prepared for repeated use andincreasing the hate of the band when used repeatedly on the same size 'ofpformf V the opposite (111860111011.

and consequently repeatedly bent and straightened in very nearlythe same place. Other objects and advantages of my- 1n ventionwill be apparent from the following description taken in connection wlth the accompanying drawings, 1n wh1ch- Figure 1shows the clamp in longitudinalsection as applied to a concrete form,

only one cornerwof the formbein'g shown,

I Fig. 2shows a plan view'of the clamping lever. Fig. 3shows the end portion ofthe band,to which the lever is to be attached,

having the securing device thereon, andFig.

kshows aperspective view ofv a wrench for forcingthe lever into tightening position.

Referring more in detail to the features shown in the drawing, a concrete form s composed of planks as-lO, extending longr tudinally, of the column or beam to be made, the planks which form one plane surfaceof thecolumn or beam being attached to a series'of cleats as 11 inone instanceshown CLAMP Eon CONCRE E-roams.

i i t ""fspecification of Letters Patent. Applica t'ion filed November 21,1913,

form together leaking 'outwhile the forms are I clamps are placed around them intervals of their length. .This clamp consists primarily preferably of a pieceof band SeriaLNo. 802.270

and 12in the otherqinstance. Theabntting parts of the differentsets collapse ofthe formby external'pressure. In order to hold the different sides of the ,tightlyulto prevent concrete being filled,

iron 13 of requisitestrength, one end thereof belngformed ma loop llin which the nose .15 of'the lever .lfii's loosely inclosed. The

lever 16, comprisest'wop arts, the handle or barjlT and the jaw 18 'pivotally connected faces -20 spwmn .cAR IifMUELLEn; or/MILWAUKEE, w sconsrNQAssIGnoR TosTERLIn I Patented'Nov. 3,1914.)

a ofplanks and cleats 1n theform are arranged "to resist i at frequent tothe barbythe pin19. (lorrespondingzflat and 21am formed on the bar and j a w respectively,which faces exten'dp'arallel I to each other and spaced apart a distance 1 equalfto the thickness of the band gn ietal when thelever isie'xtended in straight line direction to increase the size of the opening therebetween as shown in dotted lines in Fig- 1. As shown in Fig. 1, these clamping r 1 1 faces 20 and 21 extend, whollyzon one side of the longitndinalcenter line of the bar '17 passingthrough thecenter of pivot pin 19, and the faces willthereforeimpinge on each. otherwhen the handle 17 is swung in one" position asshown in full lines in Fig. 1, and are' adapted to swlng past eachotherin one direction relatively .to the jaw 18,and will open or separateas'the handle is swung in In operatiomthe band 13 isplaced around the form, the lever is held with the clamping faces ope'n as shown in dotted lines, the free end of the band. is passed between these faces, and stretched[conveniently' tight by direct pull on the free end. The handle 17 is th'en swung toward the right, the first part of its movement serving to clamp the band 13between"the faces 20 andQl, the" further movement of 17 in-the same direction serving to p1vot the lever as a whole around the nose 15 and swing theclampfl faces 20am 2lwith the band 13 clamped therebetween from the dotted to the full line position shown, thus stretching theband" tightlyaroundtheform; If, on making a part only of the swing to the right, the op erator perceives that the band is not going to be sufficiently tight,'he may swing the lever f again to the, left, thus opening the a clampingfaces and obtain a new and shorter grip "on the band. The part of the jaw 18 which the band 13 engages on the approach to the clampmgfaces is rounded as shown to avoid putting a sharp bend in the band when the clamp is set tight, as this bend must be at least approximately straightened before the clamp can be again used, and repeated sharp bends at or near the same place destroy the band.

havinga series ofapertures therein adapted to receive the end of the handle17," is at-,

tached to the band 13 under the end'of the lever as'shownin l. ""Tliis bar 22 may bepivoted to theband 13'by'the clip 23 as shown or the band 13 may simply be passed;

through the firstaperture and the-bar 22 be positioned on the'band 13 byhand.

In order to increase the leverage of 16, lugs 2% are placed'on either side of the hank dle adapted to be engaged by fingers25 on the Wrench 26 shown inIiig. l and in dotted lines in Fig. 1. An aperture 27 1s provided in the Wrench through which the bar 22 may project, and a lug ZSisprOvided opposite the fingers 25in order that. thewrench may operatethe lever in QItllBYClll'OCtlOll.

\Vhile l have describedfmy invention as embodied in the specific'form shown in the drawing, it will be understood that I do not desire to limit nyself to that form any closer than is pointed out 111 the claims as I contemplate many changes in details that will still fall Within the limits specified in the claims.

' I claim,

1; In a clamp bination of a flexible metallic band, a lever pivotally attached to one end or said band and provided with means adapted to adjust- A seciiring device consisting of a bar 22 it o g for concrete forms, the comably hold the band near its'free endfand a securing device for said lever consisting of an aperturedi barpivotally engaging said band and adapted to siving over the free end .ofsaid lever and engage the same in an aperture:

y 2. Inaclamp for concrete forms, the combination of a flexible metallic band, a lever "pivotally attachedat one end to an end of said band, said lever comprising two parts p votally attached together, corresponding gclampmg facesone on each of sa1d parts exitending ina direction perpendicular to the longitudinal center plane of the lever passthroughthe 'centerline ofthe pivot of Zing ithe lever and'only onthe side thereof towardthe free end of the band, and a secure ing device pivoted to the band and arranged to 'engagethe free end of said lever.

3. In a clamp for concrete forms, thecom b'ination of a flexible metallic band, a lever cpivotally attached atone end to an end of said band, sa1d lever comprising tvvo fparts 'pivotally attached together, corresponding clampingfaces one on each of saidparts extending in a direction transverse to the longitudinal center plane of thelrver'passingthrough the center line of the pivot pin and only on the side thereof toward the free end of the band, said clamping faces being .sub-. c stantially parallel when the lever is in extended straight line position,' the'surface- 0t the-pivoted jaw on which the'band rests 'ad-i ja'cent" to the clamping face being curved ithrough an arc of substantially ninety de- EDWARD CARL'MUELLER.- Y 1 WVitnesses:

- g Invrxelt. SMITH,

\ CI-IAS. J. KUETr-IER,

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